Merge pull request #4 from angular-libs/gitter-badge

Update README.md

Author: kuldeepkeshwar

README.md

@@ -9,6 +9,7 @@
 [![Build status](https://ci.appveyor.com/api/projects/status/vr1h5g5r5wmccrf9/branch/master?svg=true)](https://ci.appveyor.com/project/angular-libs/ui-grid/branch/master)
 [![Issue Stats](http://issuestats.com/github/angular-libs/ui-grid/badge/pr)](http://issuestats.com/github/angular-libs/ui-grid)
 [![Issue Stats](http://issuestats.com/github/angular-libs/ui-grid/badge/issue)](http://issuestats.com/github/angular-libs/ui-grid)
+[![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/angular-libs?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 ![codecov.io](https://codecov.io/github/angular-libs/ui-grid/branch.svg?branch=master)
 [![SensioLabsInsight](https://insight.sensiolabs.com/projects/33b672a9-d02a-469d-9242-e083482de9db/big.png)](https://insight.sensiolabs.com/projects/33b672a9-d02a-469d-9242-e083482de9db)
 ## ui-grid can be used to create grid with basic functionality like (sort,filter,pagination)